Tuning the Properties of Neutral Tetraazamacrocyclic Complexes of Copper(II) and Nickel(II) for Use as Host–Guest Compounds with Bismacrocyclic Transition Metal Cations
transition metal ions a planar structure of the macrocycle is obtained, which has consequences for the electrochemical behaviour of the complexes. The deviations from planarity increase with increasing macrocycle size. As a consequence the donor properties are weaker, the redox potential is shifted towards more positive values and the contribution of chemical reactions can be observed. The formation of host–guest
reaction of 3-(alk-2-enyl)benzylamino-2-(methoxycarbonyl)acrolein derivatives 3 gave 4,5-dihydro-1H-azepines 4 stereoselectively in good yields via an intramolecular carbonyl-ene reaction. Conjugated diene compounds 10 from acroleins 3 also underwent olefin-ene reaction to give azepine derivatives 11. In these azepine-ring formation, the methoxycarbonylgroup at the 2-position in 3 facilitated the progress
Asymmetric synthesis of loganin. Stereospecific formation of (1R,2R)- and (1S,2S)-2-methyl-3-cyclopenten-1-ol and (2R)- and (2S)-2-methylcyclopentanone
作者:John J. Partridge、Naresh K. Chadha、Milan R. Uskokovic